Here's one of my predictions about the full roster:
They will get rid of Doc, Pichu, and Roy.
They will add Diddy Kong, Krystal or Skippy, a Star Fox villian (Wolf, Andrew, or Scales), one of the Metroid Hunters, Ridley, Meowth, and Sonic.
This would make the franchises MORE (though not completly) balenced.
Mario, Peach, Bowser, and Luigi - Mario(4)
Samus, Zamus, Ridley and Hunter - Metroid(4)
Pikachu, Jigglypuff, Meowth, and Mewtwo(better) - Pokemon(4)
Fox, Krystal or Skippy, Falco, and villian - Star Fox(4)
Link, Zelda/Shiek, and Ganondorf (also Y. Link if he stays)(4, 5 with Y.L.)
Mr. G&W, Pit, Ness, and Ice Climbers - Classic(4)
DK* and Diddy - Donkey Kong(2)
Kirby and MetaKnight - Kirby (2)
Snake and Sonic - Third Party(2)
Yoshi - Yoshi*(1)
Wario - Wario*(1)
Marth - Fire Emblem(1)
Captian Falcon - F-Zero(1)
* = Could be classified as Mario characters too
I believe if you add all that up it should equal 34 (35 with Y. Link.)